Security transmission routing protocol for MIMO-VANET

The security routing protocol for Multi-Input-Multi-Output Vehicular Ad-hoc Network (MIMO-VANET) which is used to prevent the eavesdropping in VANET was presented in this paper. When building the routing table, this protocol stores the current channel states and restricts the VANET nodes, excepted source/ destination nodes, from obtaining the unrelated routing information. During the information transmission process, the presorted channel states in network layer are transparently transmitted to the physical layer, and decomposed as total channel state. The decomposed results, which are only known by the source/destination nodes from routing information, can be utilized to equalize the channel and to demodulate the information. As a result, the other nodes cannot effectively equalize the channel, which causes little information can be eavesdropped. The theory analysis and simulation illustrate that, when the destination nodes obtain the good signal quality, the eavesdropper suffers poor bit error rate.